class Student:
    name = None
    gender = None
    age = None
    nationality = None
    native_place = None


stu1 = Student()
stu1.name = "林俊杰"
stu1.gender = "男"
stu1.age = 20
stu1.nationality = "中国"
stu1.native_place = "山东省"

print(stu1.__dict__)

